DATA ACQUISITION AND MULTITHREAD PROCESSING IN STEPPED-FREQUENCY NOISE GROUND-BASED SAR FOR 2D REAL-TIME IMAGING

• Datum: 2026
• Hauptverfasser: Lukin, K., Tatyanko, D., Zemlyaniy, O., Palamarchuck, V., Zaets, M.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Видавничий дім «Академперіодика» 2026
• Schlagworte: stepped-frequency noise ground-based SAR; 2D imaging; data acquisition
• Online Zugang: http://rpra-journal.org.ua/index.php/ra/article/view/1489
• Назва журналу: Radio physics and radio astronomy

Subject and Purpose. In the paper, the real-time operation of the data acquisition (DAQ) system for stepped-frequency noise ground-based Synthetic Aperture Radar (SAR) is described with an emphasis on DAQ system characteristics and software in an effort to elaborate a real-time operation algorithm on this basis.Methods and Methodology. The real-time operation algorithm outlined in the paper uses Fourier analysis to process input signals acquired with the SAR receiver. The algorithm utilizes multithreading technology to achieve the required real-time performance. The validity of the proposed algorithm is evaluated against conventional signal processing algorithms and techniques using MATLAB packages for numerical analysis and graphic visualization. The experimental investigation of the proposed real-time operation algorithm as part of the software for the developed stepped-frequency noise ground-based SAR was conducted indoors via preliminary laboratory tests.Results. An algorithm for real-time data acquisition and radar imaging has been developed. Its implementation in the software for stepped-frequency noise ground-based SAR enhances the performance of the data acquisition and processing system. A comparative analysis has been performed, showing that the results obtained in the context of the proposed real-time signal-processing program align with reconstructions by standard signal-processing simulation techniques. Measurements performed with the DAQ system as part of the developed stepped-frequency noise ground-based SAR validate our approach and its particular implementation. The observations suggest good target visibility. The target resolution in range and azimuth provided by a 32-element antenna array exceeds that of the 16-antenna configuration. The multithreading approach essentially reduces software runtime. As a result, making a single radar image takes about 10 milliseconds.Conclusions. It has been shown that the developed data acquisition and processing system integrated into stepped-frequency noise ground-based SAR lends itself well to real-time radar imaging.Keywords: stepped-frequency noise ground-based SAR, 2D imaging, data acquisitionManuscript submitted 20.02.2025Radio phys. radio astron. 2026, 31(1): 026-034REFERENCES1. Batool, S., Frezza, F., Mangini, F., Simeoni, P., 2020. Introduction to Radar Scattering Application in Remote Sensing and Diagnostics: Review. Atmosphere, 11(5), 517. DOI: 10.3390/atmos110505172. Moreira, A., Prats-Iraola, P., Younis, M., Krieger, G., Hajnsek, I., Papathanassiou, K.P., 2013. A tutorial on synthetic aperture radar. IEEE Geosci. Remote Sens. Mag., 1(1), pp. 6—43. DOI: 10.1109/MGRS.2013.22483013. Park, S., Kim, Y, Lee, K., Smith, A.H., Dietz, J.E., Matson, E.T., 2020. Accessible Real-Time Surveillance Radar System for Object Detection. Sensors, 20(8), 18 pp. DOI: 10.3390/s200822154. Cumming, I.G., Wong, F.H., 2005. 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